- A+
所属分类：Web前端
代码实现：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <ul class="nav"> <li>000000000</li> <li>111111111</li> <li>222222222</li> <li>333333333</li> </ul> <script> // 闭包应用-3秒钟之后,打印所有li元素的内容 var lis = document.querySelector('.nav').querySelectorAll('li'); for (var i = 0; i < lis.length; i++) { (function(i) { setTimeout(function() { console.log(lis[i].innerHTML); }, 3000) })(i); } </script> </body> </html> 
